Mechanical movement



Filed June 12, 1954 Patented Jan. 19, 1937 UNITED STATES PATENT OFFICE 2,068,488 MECHANICAL MOVEMENT Grant Hammond, New Haven, Conn.- Application June 12, 1934, Serial No; 730,341

1 Claim.

My invention relates to that class of devices employed to produce intermittent movement of one mechanical element by another, and an object of my invention, among others, is to produce a device of this type in the use of which an extremely steady movement may be obtained and one in which the periods of rest of the driven member may be varied to an unlimited extent.

One form of a mechanical movement embodying my invention and in the construction and use of which the objects herein set out, as well as others, may be attained is illustrated in the accompanying drawing in which- Figure l is a front view of a device embodying my invention in one of several different forms.

Figure 2 is an edge view of the same.

Figure 3 is a top view.

Figure 4 is a detail view illustrating the operation of the retainer.

Many forms of apparatus in use at the present time require an intermittent movement of one part with respect to another, as for instance in the operation of moving picture apparatus in which it is necessary that the film be intermittently brought to rest, such periodic movement and intervals of rest being made use of in many other different forms of apparatus. My improved mechanical movement herein illustrated and described enables the driven member to glide easily from a condition of rest to that of movement and vice versa with extreme steadiness irrespective of the rapidity of movement, such device being illustrated in the drawing herein in one of several different forms, the numeral 5 denoting a base and 6 a standard rising therefrom, such standard hav-- ing bearings for the driven member I which, in

the present exemplification, has a rotary movement. This driven member also includes a reg-. ulator 8 which determines the character of movement of the driven member, this regulator being preferably in the form of a disk of angular shape, that herein shown being rectangular. This regulator controls the degree of movement of the driven member between each of its periods of rest.

A driver 9 is secured to a driving shaft IS 5 which may be driven in any desired manner from any suitable source of power. This driver, in the particular form herein shown, constitutes a wheel which is keyed to the shaft Hi. This driver embodies an actuator H in the ,5 form of a groove in the periphery of the driver 9 and a retainer l2 which constitutes the com centric periphery of the driver. The actuator or groove Ii may be of any desired length, that herein shown extending for an angle of ninety degrees on the periphery of the 5 driver, and the retainer therefore constituting two hundred and seventy degrees of the periphery of the driver.

In order todirect the corners l5 of the regulator 8 into the actuator or groove II a guide 10 in the form of a cam is located at the entrance of said groove in the path of movement of the corners IS, the latter when engaging said cam being directed into the groove. In the particular form herein shown this guide comprises 15 a plate l6 attached in any suitable manner to the side of the driver 9 and having a lip ll inturned to engage said corners and thereby rotate the regulator 8 to engage said corners in said groove.

From this it will be seen that when the driver 20 is rotated the corners [3 of the regulator 8 will be entered in the actuator or groove ll and will pass across the driver 9 and will pass out of said groove leaving the next following corner in posi- 2 tion to enter the groove when the latter is presented to the corner in the rotation of the driver 9. When a corner I3 leaves the groove the flats M on the regulator will be left in contact with the retainer l2, this being the concentric portion of the disk or driver 9, and the regulator will be held in this position until the groove or actuator II is again presented to receive the corners l3 of the regulator.

As hereinbefore stated the actuator or groove 35 H and the retainer l2 may occupy such relative portions of the periphery of the driver 9 that the relative periods of rest and of movement of the regulator may be readily determined by simply changing the length of the re- 40 tainer to obtain such period of rest as may b desired.

In accordance with the provisions of the patent statutes I have described the principles of operation of my invention together with the device which I now consider to represent the best embodiment thereof; but I desire to have it understood that the device shown is only illustrative and that the invention may be carried out by other means and applied to uses other than those above set out.

I claim:

A mechanical movement including a rotatably mounted driver member composed of a single piece of short cylindrical form and having a step movement is imparted to the driven member by the'entrance and exit of a single corner into and out of said groove and a guide comprising a cam secured to the side of said driver member and with a cam lip overlying its periphery to engage the corners of said driven member and guide said corners into said groove.

GRANT HAMMOND. 

